Игровой эффект (три черных слова выше — это примечания)
Экран принципа игры.
Стройте участок за участком.
Компьютерные шахматы
— это, по сути, обход dfs для поиска лучшего хода (оптимизированного в программе),
PS:
Хотя код этой игры длинный, логика понятна и проста.
Это результат кропотливых усилий блоггера в течение n месяцев (почему другие блоггеры могут закончить его за один день!!) , ссылаясь на множество веб-игр и множество материалов Baidu, поэтому эффект может быть аналогичен некоторым веб-играм.
Код игры
index.html
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>国际象棋</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="index.css">
<link rel="stylesheet" href="style.css">
</head>
<body>
<section id="view">
<aside>
<div>
<h3 title="Autoplay">Auto</h3>
<label for="white-random"><input type="checkbox" id="white-random" /><svg width="170" height="170" viewBox="0 0 170 170" fill="none" xmlns="http://www.w3.org/2000/svg" class="white"><use href="#king" /></svg></label>
<label for="black-random"><input type="checkbox" id="black-random" checked /><svg width="170" height="170" viewBox="0 0 170 170" fill="none" xmlns="http://www.w3.org/2000/svg" class="black"><use href="#king" /></svg></label>
</div>
<div>
<h3 title="Actions per Second">APS</h3>
<label for="speed-slow"><input type="radio" name="speed" id="speed-slow" /><span>1</span></label>
<label for="speed-medium"><input type="radio" name="speed" id="speed-medium" checked /><span>2</span></label>
<label for="speed-fast"><input type="radio" name="speed" id="speed-fast" /><span>4</span></label>
<label for="speed-asap"><input type="radio" name="speed" id="speed-asap" /><span>20</span></label>
</div>
<div>
<h3 title="Point of View">POV</h3>
<label for="white-perspective"><input type="radio" name="perspective" id="white-perspective" checked /><svg width="170" height="170" viewBox="0 0 170 170" fill="none" xmlns="http://www.w3.org/2000/svg" class="white"><use href="#king" /></svg></label>
<label for="black-perspective"><input type="radio" name="perspective" id="black-perspective" /><svg width="170" height="170" viewBox="0 0 170 170" fill="none" xmlns="http://www.w3.org/2000/svg" class="black"><use href="#king" /></svg></label>
</div>
</aside>
<div id="board"></div>
</section>
<svg aria-hidden style="display: none;" width="170" height="170" viewBox="0 0 170 170" fill="none" xmlns="http://www.w3.org/2000/svg">
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<path fill-rule="evenodd" clip-rule="evenodd" d="M98.3201 39.3222C98.7615 37.961 99 36.5084 99 35C99 27.268 92.732 21 85 21C77.268 21 71 27.268 71 35C71 36.5084 71.2385 37.961 71.6799 39.3222C62.3358 42.7698 55.5716 49.7318 54.2398 58H42.9485C29.5311 58 19.9194 70.951 23.8059 83.7931L34.7006 119.793C36.3917 125.381 40.3736 129.799 45.4311 132.146C42.2838 134.713 40.2741 138.622 40.2741 143C40.2741 150.732 46.5421 157 54.2741 157H116.274C124.006 157 130.274 150.732 130.274 143C130.274 138.528 128.177 134.545 124.913 131.982C129.807 129.597 133.647 125.254 135.299 119.793L146.194 83.7932C150.081 70.951 140.469 58 127.052 58H115.76C114.428 49.7318 107.664 42.7698 98.3201 39.3222Z" />
</g>
<g id="king">
<path fill="var(--stroke)" d="M71.3981 29V38C74.4851 38 77.3566 36.4179 79.0059 33.8085C80.6552 31.1991 80.8521 27.9265 79.5275 25.1382L71.3981 29ZM55.5392 47V56C59.196 56 62.4893 53.7874 63.8715 50.4019C65.2537 47.0165 64.4501 43.1312 61.8383 40.5718L55.5392 47ZM16.8101 72.5915L25.4512 70.0754L25.4512 70.0754L16.8101 72.5915ZM30.4959 119.592L39.137 117.075L39.137 117.075L30.4959 119.592ZM44.3251 133.266L50.7933 139.524C52.9992 137.244 53.8418 133.971 53.011 130.909C52.1801 127.848 49.7986 125.449 46.7427 124.597L44.3251 133.266ZM126.438 133.253L123.999 124.59C120.947 125.449 118.572 127.851 117.747 130.913C116.923 133.974 117.77 137.244 119.978 139.52L126.438 133.253ZM140.22 119.592L148.861 122.108L148.861 122.108L140.22 119.592ZM153.906 72.5915L145.265 70.0753L145.265 70.0753L153.906 72.5915ZM115.236 47L108.937 40.5718C106.325 43.1312 105.522 47.0165 106.904 50.4019C108.286 53.7874 111.579 56 115.236 56V47ZM99.3773 29L91.2479 25.1382C89.9233 27.9265 90.1202 31.1991 91.7695 33.8085C93.4188 36.4179 96.2903 38 99.3773 38V29ZM79.3877 24.5C79.3877 23.6716 80.0593 23 80.8877 23V5C70.1181 5 61.3877 13.7304 61.3877 24.5H79.3877ZM79.5275 25.1382C79.4407 24.9555 79.3877 24.7465 79.3877 24.5H61.3877C61.3877 27.4743 62.0598 30.3168 63.2688 32.8618L79.5275 25.1382ZM71.3981 20H62.8877V38H71.3981V20ZM62.8877 20C52.1181 20 43.3877 28.7304 43.3877 39.5H61.3877C61.3877 38.6716 62.0593 38 62.8877 38V20ZM43.3877 39.5C43.3877 44.9545 45.639 49.8994 49.2401 53.4282L61.8383 40.5718C61.5498 40.2891 61.3877 39.9216 61.3877 39.5H43.3877ZM55.5392 38H36.0125V56H55.5392V38ZM36.0125 38C16.6845 38 2.7653 56.5505 8.16895 75.1077L25.4512 70.0754C23.4015 63.0364 28.6812 56 36.0125 56V38ZM8.16895 75.1077L21.8548 122.108L39.137 117.075L25.4512 70.0754L8.16895 75.1077ZM21.8548 122.108C24.7108 131.916 32.4229 139.291 41.9074 141.936L46.7427 124.597C43.1399 123.592 40.2185 120.789 39.137 117.075L21.8548 122.108ZM37.8569 127.008C33.861 131.139 31.3877 136.79 31.3877 143H49.3877C49.3877 141.646 49.9143 140.433 50.7933 139.524L37.8569 127.008ZM31.3877 143C31.3877 155.703 41.6852 166 54.3877 166V148C51.6263 148 49.3877 145.761 49.3877 143H31.3877ZM54.3877 166H116.388V148H54.3877V166ZM116.388 166C129.09 166 139.388 155.703 139.388 143H121.388C121.388 145.761 119.149 148 116.388 148V166ZM139.388 143C139.388 136.779 136.906 131.119 132.898 126.987L119.978 139.52C120.859 140.429 121.388 141.643 121.388 143H139.388ZM128.876 141.917C138.33 139.256 146.012 131.893 148.861 122.108L131.579 117.075C130.5 120.781 127.59 123.579 123.999 124.59L128.876 141.917ZM148.861 122.108L162.547 75.1077L145.265 70.0753L131.579 117.075L148.861 122.108ZM162.547 75.1077C167.951 56.5504 154.032 38 134.704 38V56C142.035 56 147.315 63.0364 145.265 70.0753L162.547 75.1077ZM134.704 38H115.236V56H134.704V38ZM121.535 53.4282C125.136 49.8994 127.388 44.9545 127.388 39.5H109.388C109.388 39.9216 109.226 40.2891 108.937 40.5718L121.535 53.4282ZM127.388 39.5C127.388 28.7304 118.657 20 107.888 20V38C108.716 38 109.388 38.6716 109.388 39.5H127.388ZM107.888 20H99.3773V38H107.888V20ZM91.3877 24.5C91.3877 24.7465 91.3347 24.9555 91.2479 25.1382L107.507 32.8618C108.716 30.3168 109.388 27.4743 109.388 24.5H91.3877ZM89.8877 23C90.7161 23 91.3877 23.6716 91.3877 24.5H109.388C109.388 13.7304 100.657 5 89.8877 5V23ZM80.8877 23H89.8877V5H80.8877V23Z" />
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</g>
</svg>
<script src="index.js"></script>
</body>
</html>
index.css
button, hr, input {
overflow: visible
}
audio, canvas, progress, video {
display : inline - block
}
progress, sub, sup {
vertical-align: baseline
}
html {
font-family: sans-serif;
line-height: 1.15;
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 100%
}
body {
margin: 0
}
menu, article, aside, details, footer, header, nav, section {
display: block}
h1 {
font-size: 2em;
margin: .67em 0
}
figcaption, figure, main {
display: block
}
figure {
margin: 1em 40px
}
hr {
box-sizing: content-box;
height: 0
}
code, kbd, pre, samp {
font-family: monospace, monospace;
font-size: 1em
}
a {
background-color: transparent;
-webkit-text-decoration-skip: objects
}
a: active, a: hover {
outline-width: 0
}
abbr[title] {
border-bottom: none;
text-decoration: underline;
text-decoration: underline dotted
}
b, strong {
font-weight: bolder
}
dfn {
font-style: italic
}
mark {
background-color: #ff0;
color: #000
}
small {
font-size: 80%
}
sub, sup {
font-size: 75%;
line-height: 0;
position: relative
}
sub {
bottom: -.25em
}
sup {
top: -.5em
}
audio: not([controls]) {
display: none;
height: 0
}
img {
border-style: none
}
svg: not(:root) {
overflow: hidden
}
button, input, optgroup, select, textarea {
font-family: sans-serif;
font-size: 100%;
line-height: 1.15;
margin: 0
}
button, input {
}
button, select {
text-transform: none
}
[type = submit], r[type = reset], button, html[type = button] {
-webkit-appearance: button
}
[type = button] :: -moz-focus-inner, [type = reset] :: -moz-focus-inner, [type = submit] :: -moz-focus-inner, button :: -moz-focus-inner {
border-style: none;
padding: 0
}
[type = button]: -moz-focusring, [type = reset]: -moz-focusring, [type = submit]: -moz-focusring, button: -moz-focusring {
outline: ButtonText dotted 1px
}
fieldset {
border: 1px solid silver;
margin: 0 2px;
padding: .35em .625em .75em
}
legend {
box-sizing: border-box;
color: inherit;
display: table;
max-width: 100%;
padding: 0;
white-space: normal
}
progress{
}
textarea {
overflow: auto
}
[type = checkbox], [type = radio] {
box - sizing: border-box;
padding: 0
}
[type = number] :: -webkit-inner-spin-button, [type = number] :: -webkit-outer-spin-button {
height: auto
}
[type = search] {
-webkit-appearance:textfield;outline-offset: -2px
}
[type = search] :: -webkit-search-cancel-button, [type = search] :: -webkit-search-decoration {
-webkit-appearance: none
}
::-webkit-file-upload-button {
-webkit-appearance: button;
font: inherit
}
summary {
display: list-item
}
[hidden], template {
display: none;
}
стиль.css
:root {
--border-width: calc(var(--diameter-tile) / 60);
--diameter-board: min(85vw, 85vh);
--diameter-tile: calc(1 / 8 * var(--diameter-board));
--edge-width: calc((min(100vw, 100vh) - var(--diameter-board)) * 0.3);
--color-danger: tomato;
--color-success: #1d83e0;
--color-white: #f0f0f0;
--color-black: #222;
--color-board-hue: 30;
--color-board-sat: 40%;
--color-shadow: hsl(var(--color-board-hue), var(--color-board-sat), 50%);
--color-shadow-lighter: hsl(var(--color-board-hue), var(--color-board-sat), 55%);
--transition-ease: cubic-bezier(0.25, 1, 0.5, 1);
--color-background: var(--color-black);
}
aside {
display: flex;
justify-content: space-between;
left: 0;
position: absolute;
top: calc(var(--edge-width) * -0.55);
transform: translateY(-50%);
width: 100%;
z-index: 999;
}
aside div {
align-items: center;
color: white;
display: flex;
}
aside div > * {
align-items: center;
display: flex;
}
aside div > * + * {
margin-left: calc(var(--border-width) * 2);
}
aside div h3,
aside div label {
font-size: calc(var(--edge-width) * 0.3);
height: calc(var(--edge-width) * 0.3);
line-height: 1;
margin-bottom: 0;
margin-top: 0;
text-transform: uppercase;
}
aside div label {
cursor: pointer;
}
aside div input {
left: -99999px;
position: absolute;
}
aside div input + * {
opacity: 0.5;
}
aside div input:checked + * {
font-weight: bold;
opacity: 1;
}
aside div svg {
height: calc(var(--edge-width) * 0.5);
width: auto;
}
html,
body {
height: 100%;
}
body {
background: rgb(153, 153, 251);
overflow: hidden;
transition: background-color 250ms ease-in-out;
}
#view {
background: var(--color-shadow-lighter);
box-shadow: 0 0 0 calc(var(--border-width) * 3) var(--color-shadow-lighter),
0 0 0 var(--edge-width) var(--color-shadow);
height: var(--diameter-board);
margin: calc((100vh - var(--diameter-board)) * 0.5)
calc((100vw - var(--diameter-board)) * 0.5);
position: relative;
width: var(--diameter-board);
}
.board {
display: flex;
flex-direction: column-reverse;
height: 100%;
width: 100%;
}
.board .row {
display: flex;
height: var(--diameter-tile);
width: 100%;
}
.perspective-black .board .row {
flex-direction: row-reverse;
}
.perspective-black .board {
flex-direction: column;
}
.board .row .tile {
background-color: currentcolor;
border: none;
box-shadow: inset 0 0 0 var(--border-width) var(--color-shadow-lighter);
display: flex;
flex-direction: column;
height: var(--diameter-tile);
justify-content: space-between;
padding: 0;
position: relative;
transition: background-color 350ms var(--transition-ease);
width: var(--diameter-tile);
}
.perspective-black .board .row:nth-child(even) .tile:nth-child(odd),
.perspective-black .board .row:nth-child(odd) .tile:nth-child(even),
.perspective-white .board .row:nth-child(even) .tile:nth-child(even),
.perspective-white .board .row:nth-child(odd) .tile:nth-child(odd) {
color: hsl(var(--color-board-hue), var(--color-board-sat), 62%);
}
.perspective-black .board .row:nth-child(even) .tile:nth-child(even),
.perspective-black .board .row:nth-child(odd) .tile:nth-child(odd),
.perspective-white .board .row:nth-child(even) .tile:nth-child(odd),
.perspective-white .board .row:nth-child(odd) .tile:nth-child(even) {
color: hsl(var(--color-board-hue), var(--color-board-sat), 70%);
}
.board .row .tile.highlight-active {
}
.board .row .tile.highlight-capture {
}
.board .row .tile.highlight-move {
}
.board .row .tile .move,
.board .row .tile .moves,
.board .row .tile .captures {
box-sizing: border-box;
display: flex;
flex-wrap: wrap;
height: var(--diameter-tile);
justify-content: center;
left: 0;
padding: calc(var(--diameter-tile) * 0.025);
position: absolute;
top: 0;
width: var(--diameter-tile);
z-index: 9;
}
.board .row .tile .move,
.board .row .tile .moves {
align-content: center;
align-items: center;
}
.board .row .tile .captures {
align-items: flex-start;
justify-content: space-between;
}
.board .row .tile:not(.occupied) .captures {
align-items: center;
justify-content: center;
}
.board .row .tile > div > svg {
--stroke: transparent;
box-sizing: border-box;
height: var(--di);
line-height: var(--di);
width: var(--di);
}
.board .row .tile .move svg {
--di: calc(var(--diameter-tile) / 4);
--fill: var(--color-shadow);
}
.board .row .tile .moves svg,
.board .row .tile .captures svg {
--di: calc(var(--diameter-tile) / 4);
--fill: var(--color-shadow);
opacity: 0.4;
}
.board .row .tile.occupied .captures svg {
position: absolute; }
.board .row .tile.occupied .captures svg:nth-child(1) {
top: 0; left: 0; }
.board .row .tile.occupied .captures svg:nth-child(2) {
top: 0; right: 0; }
.board .row .tile.occupied .captures svg:nth-child(3) {
bottom: calc(var(--di) * 0.1); left: 0; }
.board .row .tile.occupied .captures svg:nth-child(4) {
bottom: calc(var(--di) * 0.1); right: 0; }
.board .row .tile.occupied .captures svg:nth-child(5) {
top: calc(50% - var(--di) * 0.55); left: 0; }
.board .row .tile.occupied .captures svg:nth-child(6) {
top: calc(50% - var(--di) * 0.55); right: 0; }
.board .row .tile.occupied .captures svg:nth-child(7) {
top: 0; left: calc(50% - var(--di) * 0.5); }
.board .row .tile.occupied .captures svg:nth-child(8) {
bottom: calc(var(--di) * 0.1); left: calc(50% - var(--di) * 0.5); }
.touching .board .row .tile .moves,
.touching .board .row .tile .captures,
.turn-black .board .row .tile .moves .white,
.turn-black .board .row .tile .captures .white,
.turn-white .board .row .tile .moves .black,
.turn-white .board .row .tile .captures .black {
display: none;
}
.board .row .tile[class*="highlight-"] .moves,
.board .row .tile[class*="highlight-"] .captures {
display: none;
}
button:focus {
outline: none;
position: relative;
z-index: 9;
}
svg {
--fill: var(--color-black);
--stroke: var(--color-shadow);
fill: var(--fill);
}
svg.white {
--fill: var(--color-white); }
svg.black {
--fill: var(--color-black); }
.pieces {
display: block;
height: var(--diameter-board);
left: 0;
pointer-events: none;
position: absolute;
top: 0;
width: var(--diameter-board);
z-index: 99;
}
.pieces .piece.white {
--pos-row: -1;
}
.pieces .piece.black {
--pos-row: 8;
}
.pieces .piece {
--pos-col: 3.5;
--scale: 0;
--transition-delay: 0ms;
--transition-duration: 200ms;
bottom: 0;
display: block;
height: var(--diameter-tile);
position: absolute;
left: 0;
transform: translate(
calc(var(--pos-col) * 100%),
calc(var(--pos-row) * -100%)
)
translateZ(0);
transform-origin: 50% 50%;
transition: all var(--transition-duration) var(--transition-ease)
var(--transition-delay);
width: var(--diameter-tile);
}
.perspective-black .pieces .piece {
transform: translate(
calc((7 - var(--pos-col)) * 100%),
calc((7 - var(--pos-row)) * -100%)
)
translateZ(0);
}
.pieces .piece svg {
display: block;
left: 50%;
opacity: 1;
position: absolute;
top: 50%;
transform: translate(-50%, -50%) translateZ(0) scale(var(--scale));
transform-origin: 50% 50%;
transition: transform var(--transition-duration) var(--transition-ease),
fill var(--transition-duration) var(--transition-ease),
opacity var(--transition-duration) var(--transition-ease);
}
.turn-white .pieces .piece:not(.highlight-capture) svg.black,
.turn-black .pieces .piece:not(.highlight-capture) svg.white,
.turn-black .pieces .piece:not(.can-move):not(.can-capture) svg.black,
.turn-white .pieces .piece:not(.can-move):not(.can-capture) svg.white {
--stroke: transparent;
opacity: 0.8;
}
@-webkit-keyframes wobble {
0%, 50%, 100% {
transform: translate(-50%, -50%) translateZ(0) scale(1) rotate(0deg); }
25% {
transform: translate(-50%, -50%) translateZ(0) scale(1.1) rotate(-2deg); }
75% {
transform: translate(-50%, -50%) translateZ(0) scale(1.1) rotate(2deg); }
}
@keyframes wobble {
0%, 50%, 100% {
transform: translate(-50%, -50%) translateZ(0) scale(1) rotate(0deg); }
25% {
transform: translate(-50%, -50%) translateZ(0) scale(1.1) rotate(-2deg); }
75% {
transform: translate(-50%, -50%) translateZ(0) scale(1.1) rotate(2deg); }
}
.pieces .piece.highlight-active svg {
-webkit-animation: wobble 500ms linear infinite;
animation: wobble 500ms linear infinite;
--stroke: var(--color-success);
}
.pieces .piece.highlight-capture svg {
--stroke: var(--color-danger);
}
.piece svg {
--svg-di: calc(var(--diameter-tile) * 0.666);
display: block;
font-weight: bold;
height: var(--svg-di);
left: 50%;
line-height: var(--svg-di);
position: absolute;
stroke-linejoin: round;
text-align: center;
top: 50%;
transform: translate(-50%, -50%);
width: var(--svg-di);
}
index.js
"use strict";
console.clear();
let PIECE_DIR_CALC = 0;
class Utils {
static colToInt(col) {
return Board.COLS.indexOf(col);
}
static rowToInt(row) {
return Board.ROWS.indexOf(row);
}
static intToCol(int) {
return Board.COLS[int];
}
static intToRow(int) {
return Board.ROWS[int];
}
static getPositionsFromShortCode(shortCode) {
const positions = Utils.getInitialPiecePositions();
const overrides = {
};
const defaultPositionMode = shortCode.charAt(0) === "X";
if (defaultPositionMode) {
shortCode = shortCode.slice(1);
}
shortCode.split(",").forEach((string) => {
const promoted = string.charAt(0) === "P";
if (promoted) {
string = string.slice(1);
}
if (defaultPositionMode) {
const inactive = string.length === 3;
const id = string.slice(0, 2);
const col = inactive ? undefined : string.charAt(2);
const row = inactive ? undefined : string.charAt(3);
const moves = string.charAt(4) || "1";
overrides[id] = {
col,
row,
active: !inactive,
_moves: parseInt(moves),
_promoted: promoted,
};
}
else {
const moved = string.length >= 4;
const id = string.slice(0, 2);
const col = string.charAt(moved ? 2 : 0);
const row = string.charAt(moved ? 3 : 1);
const moves = string.charAt(4) || moved ? "1" : "0";
overrides[id] = {
col, row, active: true, _moves: parseInt(moves), _promoted: promoted };
}
});
for (let id in positions) {
if (overrides[id]) {
positions[id] = overrides[id];
}
else {
positions[id] = defaultPositionMode ? positions[id] : {
active: false };
}
}
return positions;
}
static getInitialBoardPieces(parent, pieces) {
const boardPieces = {
};
const container = document.createElement("div");
container.className = "pieces";
parent.appendChild(container);
for (let pieceId in pieces) {
const boardPiece = document.createElement("div");
boardPiece.className = `piece ${
pieces[pieceId].data.player.toLowerCase()}`;
boardPiece.innerHTML = pieces[pieceId].shape();
container.appendChild(boardPiece);
boardPieces[pieceId] = boardPiece;
}
return boardPieces;
}
static getInitialBoardTiles(parent, handler) {
const tiles = {
1: {
}, 2: {
}, 3: {
}, 4: {
}, 5: {
}, 6: {
}, 7: {
}, 8: {
} };
const board = document.createElement("div");
board.className = "board";
parent.appendChild(board);
for (let i = 0; i < 8; i++) {
const row = document.createElement("div");
row.className = "row";
board.appendChild(row);
for (let j = 0; j < 8; j++) {
const tile = document.createElement("button");
tile.className = "tile";
const r = Utils.intToRow(i);
const c = Utils.intToCol(j);
tile.addEventListener("click", () => handler({
row: r, col: c }));
row.appendChild(tile);
tiles[r][c] = tile;
}
}
return tiles;
}
static getInitialBoardState(construct = () => undefined) {
const blankRow = () => ({
A: construct(),
B: construct(),
C: construct(),
D: construct(),
E: construct(),
F: construct(),
G: construct(),
H: construct(),
});
return {
1: Object.assign({
}, blankRow()),
2: Object.assign({
}, blankRow()),
3: Object.assign({
}, blankRow()),
4: Object.assign({
}, blankRow()),
5: Object.assign({
}, blankRow()),
6: Object.assign({
}, blankRow()),
7: Object.assign({
}, blankRow()),
8: Object.assign({
}, blankRow()),
};
}
static getInitialPiecePositions() {
return {
A8: {
active: true, row: "8", col: "A" },
B8: {
active: true, row: "8", col: "B" },
C8: {
active: true, row: "8", col: "C" },
D8: {
active: true, row: "8", col: "D" },
E8: {
active: true, row: "8", col: "E" },
F8: {
active: true, row: "8", col: "F" },
G8: {
active: true, row: "8", col: "G" },
H8: {
active: true, row: "8", col: "H" },
A7: {
active: true, row: "7", col: "A" },
B7: {
active: true, row: "7", col: "B" },
C7: {
active: true, row: "7", col: "C" },
D7: {
active: true, row: "7", col: "D" },
E7: {
active: true, row: "7", col: "E" },
F7: {
active: true, row: "7", col: "F" },
G7: {
active: true, row: "7", col: "G" },
H7: {
active: true, row: "7", col: "H" },
A2: {
active: true, row: "2", col: "A" },
B2: {
active: true, row: "2", col: "B" },
C2: {
active: true, row: "2", col: "C" },
D2: {
active: true, row: "2", col: "D" },
E2: {
active: true, row: "2", col: "E" },
F2: {
active: true, row: "2", col: "F" },
G2: {
active: true, row: "2", col: "G" },
H2: {
active: true, row: "2", col: "H" },
A1: {
active: true, row: "1", col: "A" },
B1: {
active: true, row: "1", col: "B" },
C1: {
active: true, row: "1", col: "C" },
D1: {
active: true, row: "1", col: "D" },
E1: {
active: true, row: "1", col: "E" },
F1: {
active: true, row: "1", col: "F" },
G1: {
active: true, row: "1", col: "G" },
H1: {
active: true, row: "1", col: "H" },
};
}
static getInitialPieces() {
return {
A8: new Piece({
id: "A8", player: "BLACK", type: "ROOK" }),
B8: new Piece({
id: "B8", player: "BLACK", type: "KNIGHT" }),
C8: new Piece({
id: "C8", player: "BLACK", type: "BISHOP" }),
D8: new Piece({
id: "D8", player: "BLACK", type: "QUEEN" }),
E8: new Piece({
id: "E8", player: "BLACK", type: "KING" }),
F8: new Piece({
id: "F8", player: "BLACK", type: "BISHOP" }),
G8: new Piece({
id: "G8", player: "BLACK", type: "KNIGHT" }),
H8: new Piece({
id: "H8", player: "BLACK", type: "ROOK" }),
A7: new Piece({
id: "A7", player: "BLACK", type: "PAWN" }),
B7: new Piece({
id: "B7", player: "BLACK", type: "PAWN" }),
C7: new Piece({
id: "C7", player: "BLACK", type: "PAWN" }),
D7: new Piece({
id: "D7", player: "BLACK", type: "PAWN" }),
E7: new Piece({
id: "E7", player: "BLACK", type: "PAWN" }),
F7: new Piece({
id: "F7", player: "BLACK", type: "PAWN" }),
G7: new Piece({
id: "G7", player: "BLACK", type: "PAWN" }),
H7: new Piece({
id: "H7", player: "BLACK", type: "PAWN" }),
A2: new Piece({
id: "A2", player: "WHITE", type: "PAWN" }),
B2: new Piece({
id: "B2", player: "WHITE", type: "PAWN" }),
C2: new Piece({
id: "C2", player: "WHITE", type: "PAWN" }),
D2: new Piece({
id: "D2", player: "WHITE", type: "PAWN" }),
E2: new Piece({
id: "E2", player: "WHITE", type: "PAWN" }),
F2: new Piece({
id: "F2", player: "WHITE", type: "PAWN" }),
G2: new Piece({
id: "G2", player: "WHITE", type: "PAWN" }),
H2: new Piece({
id: "H2", player: "WHITE", type: "PAWN" }),
A1: new Piece({
id: "A1", player: "WHITE", type: "ROOK" }),
B1: new Piece({
id: "B1", player: "WHITE", type: "KNIGHT" }),
C1: new Piece({
id: "C1", player: "WHITE", type: "BISHOP" }),
D1: new Piece({
id: "D1", player: "WHITE", type: "QUEEN" }),
E1: new Piece({
id: "E1", player: "WHITE", type: "KING" }),
F1: new Piece({
id: "F1", player: "WHITE", type: "BISHOP" }),
G1: new Piece({
id: "G1", player: "WHITE", type: "KNIGHT" }),
H1: new Piece({
id: "H1", player: "WHITE", type: "ROOK" }),
};
}
}
class Shape {
static shape(player, piece) {
return `<svg class="${player}" width="170" height="170" viewBox="0 0 170 170" fill="none" xmlns="http://www.w3.org/2000/svg">
<use href="#${piece}" />
</svg>`;
}
static shapeBishop(player) {
return Shape.shape(player, "bishop");
}
static shapeKing(player) {
return Shape.shape(player, "king");
}
static shapeKnight(player) {
return Shape.shape(player, "knight");
}
static shapePawn(player) {
return Shape.shape(player, "pawn");
}
static shapeQueen(player) {
return Shape.shape(player, "queen");
}
static shapeRook(player) {
return Shape.shape(player, "rook");
}
}
class Constraints {
static generate(args, resultingChecks) {
let method;
const {
piecePositions, piece } = args;
if (piecePositions[piece.data.id].active) {
switch (piece.data.type) {
case "BISHOP":
method = Constraints.constraintsBishop;
break;
case "KING":
method = Constraints.constraintsKing;
break;
case "KNIGHT":
method = Constraints.constraintsKnight;
break;
case "PAWN":
method = Constraints.constraintsPawn;
break;
case "QUEEN":
method = Constraints.constraintsQueen;
break;
case "ROOK":
method = Constraints.constraintsRook;
break;
}
}
const result = method ? method(args) : {
moves: [], captures: [] };
if (resultingChecks) {
const moveIndex = args.moveIndex + 1;
result.moves = result.moves.filter((location) => !resultingChecks({
piece, location, capture: false, moveIndex }).length);
result.captures = result.captures.filter((location) => !resultingChecks({
piece, location, capture: true, moveIndex }).length);
}
return result;
}
static constraintsBishop(args) {
return Constraints.constraintsDiagonal(args);
}
static constraintsDiagonal(args) {
const response = {
moves: [], captures: [] };
const {
piece } = args;
Constraints.runUntil(piece.dirNW.bind(piece), response, args);
Constraints.runUntil(piece.dirNE.bind(piece), response, args);
Constraints.runUntil(piece.dirSW.bind(piece), response, args);
Constraints.runUntil(piece.dirSE.bind(piece), response, args);
return response;
}
static constraintsKing(args) {
const {
piece, kingCastles, piecePositions } = args;
const moves = [];
const captures = [];
const locations = [
piece.dirN(1, piecePositions),
piece.dirNE(1, piecePositions),
piece.dirE(1, piecePositions),
piece.dirSE(1, piecePositions),
piece.dirS(1, piecePositions),
piece.dirSW(1, piecePositions),
piece.dirW(1, piecePositions),
piece.dirNW(1, piecePositions),
];
if (kingCastles) {
const castles = kingCastles(piece);
castles.forEach((position) => moves.push(position));
}
locations.forEach((location) => {
const value = Constraints.relationshipToTile(location, args);
if (value === "BLANK") {
moves.push(location);
}
else if (value === "ENEMY") {
captures.push(location);
}
});
return {
moves, captures };
}
static constraintsKnight(args) {
const {
piece, piecePositions } = args;
const moves = [];
const captures = [];
const locations = [
piece.dir(1, 2, piecePositions),
piece.dir(1, -2, piecePositions),
piece.dir(2, 1, piecePositions),
piece.dir(2, -1, piecePositions),
piece.dir(-1, 2, piecePositions),
piece.dir(-1, -2, piecePositions),
piece.dir(-2, 1, piecePositions),
piece.dir(-2, -1, piecePositions),
];
locations.forEach((location) => {
const value = Constraints.relationshipToTile(location, args);
if (value === "BLANK") {
moves.push(location);
}
else if (value === "ENEMY") {
captures.push(location);
}
});
return {
moves, captures };
}
static constraintsOrthangonal(args) {
const {
piece } = args;
const response = {
moves: [], captures: [] };
Constraints.runUntil(piece.dirN.bind(piece), response, args);
Constraints.runUntil(piece.dirE.bind(piece), response, args);
Constraints.runUntil(piece.dirS.bind(piece), response, args);
Constraints.runUntil(piece.dirW.bind(piece), response, args);
return response;
}
static constraintsPawn(args) {
const {
piece, piecePositions } = args;
const moves = [];
const captures = [];
const locationN1 = piece.dirN(1, piecePositions);
const locationN2 = piece.dirN(2, piecePositions);
if (Constraints.relationshipToTile(locationN1, args) === "BLANK") {
moves.push(locationN1);
if (!piece.moves.length && Constraints.relationshipToTile(locationN2, args) === "BLANK") {
moves.push(locationN2);
}
}
[
[piece.dirNW(1, piecePositions), piece.dirW(1, piecePositions)],
[piece.dirNE(1, piecePositions), piece.dirE(1, piecePositions)],
].forEach(([location, enPassant]) => {
const standardCaptureRelationship = Constraints.relationshipToTile(location, args);
const enPassantCaptureRelationship = Constraints.relationshipToTile(enPassant, args);
if (standardCaptureRelationship === "ENEMY") {
captures.push(location);
}
else if (piece.moves.length > 0 && enPassantCaptureRelationship === "ENEMY") {
const enPassantRow = enPassant.row === (piece.playerWhite() ? "5" : "4");
const other = Constraints.locationToPiece(enPassant, args);
if (enPassantRow && other && other.data.type === "PAWN") {
if (other.moves.length === 1 && other.moves[0] === args.moveIndex - 1) {
location.capture = Object.assign({
}, enPassant);
captures.push(location);
}
}
}
});
return {
moves, captures };
}
static constraintsQueen(args) {
const diagonal = Constraints.constraintsDiagonal(args);
const orthagonal = Constraints.constraintsOrthangonal(args);
return {
moves: diagonal.moves.concat(orthagonal.moves),
captures: diagonal.captures.concat(orthagonal.captures),
};
}
static constraintsRook(args) {
return Constraints.constraintsOrthangonal(args);
}
static locationToPiece(location, args) {
if (!location) {
return undefined;
}
const {
state, pieces } = args;
const row = state[location.row];
const occupyingId = row === undefined ? undefined : row[location.col];
return pieces[occupyingId];
}
static relationshipToTile(location, args) {
if (!location) {
return undefined;
}
const {
piece } = args;
const occupying = Constraints.locationToPiece(location, args);
if (occupying) {
return occupying.data.player === piece.data.player ? "FRIEND" : "ENEMY";
}
else {
return "BLANK";
}
}
static runUntil(locationFunction, response, args) {
const {
piecePositions } = args;
let inc = 1;
let location = locationFunction(inc++, piecePositions);
while (location) {
let abort = false;
const relations = Constraints.relationshipToTile(location, args);
if (relations === "ENEMY") {
response.captures.push(location);
abort = true;
}
else if (relations === "FRIEND") {
abort = true;
}
else {
response.moves.push(location);
}
if (abort) {
location = undefined;
}
else {
location = locationFunction(inc++, piecePositions);
}
}
}
}
class Piece {
constructor(data) {
this.moves = [];
this.promoted = false;
this.updateShape = false;
this.data = data;
}
get orientation() {
return this.data.player === "BLACK" ? -1 : 1;
}
dirN(steps, positions) {
return this.dir(steps, 0, positions);
}
dirS(steps, positions) {
return this.dir(-steps, 0, positions);
}
dirW(steps, positions) {
return this.dir(0, -steps, positions);
}
dirE(steps, positions) {
return this.dir(0, steps, positions);
}
dirNW(steps, positions) {
return this.dir(steps, -steps, positions);
}
dirNE(steps, positions) {
return this.dir(steps, steps, positions);
}
dirSW(steps, positions) {
return this.dir(-steps, -steps, positions);
}
dirSE(steps, positions) {
return this.dir(-steps, steps, positions);
}
dir(stepsRow, stepsColumn, positions) {
PIECE_DIR_CALC++;
const row = Utils.rowToInt(positions[this.data.id].row) + this.orientation * stepsRow;
const col = Utils.colToInt(positions[this.data.id].col) + this.orientation * stepsColumn;
if (row >= 0 && row <= 7 && col >= 0 && col <= 7) {
return {
row: Utils.intToRow(row), col: Utils.intToCol(col) };
}
return undefined;
}
move(moveIndex) {
this.moves.push(moveIndex);
}
options(moveIndex, state, pieces, piecePositions, resultingChecks, kingCastles) {
return Constraints.generate({
moveIndex, state, piece: this, pieces, piecePositions, kingCastles }, resultingChecks);
}
playerBlack() {
return this.data.player === "BLACK";
}
playerWhite() {
return this.data.player === "WHITE";
}
promote(type = "QUEEN") {
this.data.type = type;
this.promoted = true;
this.updateShape = true;
}
shape() {
const player = this.data.player.toLowerCase();
switch (this.data.type) {
case "BISHOP":
return Shape.shapeBishop(player);
case "KING":
return Shape.shapeKing(player);
case "KNIGHT":
return Shape.shapeKnight(player);
case "PAWN":
return Shape.shapePawn(player);
case "QUEEN":
return Shape.shapeQueen(player);
case "ROOK":
return Shape.shapeRook(player);
}
}
}
class Board {
constructor(pieces, piecePositions) {
this.checksBlack = [];
this.checksWhite = [];
this.piecesTilesCaptures = {
};
this.piecesTilesMoves = {
};
this.tilesPiecesBlackCaptures = Utils.getInitialBoardState(() => []);
this.tilesPiecesBlackMoves = Utils.getInitialBoardState(() => []);
this.tilesPiecesWhiteCaptures = Utils.getInitialBoardState(() => []);
this.tilesPiecesWhiteMoves = Utils.getInitialBoardState(() => []);
this.pieceIdsBlack = [];
this.pieceIdsWhite = [];
this.state = Utils.getInitialBoardState();
this.pieces = pieces;
for (let id in pieces) {
if (pieces[id].playerWhite()) {
this.pieceIdsWhite.push(id);
}
else {
this.pieceIdsBlack.push(id);
}
}
this.initializePositions(piecePositions);
}
initializePositions(piecePositions) {
this.piecePositions = piecePositions;
this.initializeState();
this.piecesUpdate(0);
}
initializeState() {
for (let pieceId in this.pieces) {
const {
row, col, active, _moves, _promoted } = this.piecePositions[pieceId];
if (_moves) {
delete this.piecePositions[pieceId]._moves;
}
if (_promoted) {
delete this.piecePositions[pieceId]._promoted;
this.pieces[pieceId].promote();
}
if (active) {
this.state[row] = this.state[row] || [];
this.state[row][col] = pieceId;
}
}
}
kingCastles(king) {
const castles = [];
if (king.moves.length) {
return castles;
}
const kingIsWhite = king.playerWhite();
const moves = kingIsWhite ? this.tilesPiecesBlackMoves : this.tilesPiecesWhiteMoves;
const checkPositions = (row, rookCol, castles) => {
const cols = rookCol === "A" ? ["D", "C", "B"] : ["F", "G"];
const rookId = `${
rookCol}${
row}`;
const rook = this.pieces[rookId];
const {
active } = this.piecePositions[rookId];
if (active && rook.moves.length === 0) {
let canCastle = true;
cols.forEach((col) => {
if (this.state[row][col]) {
canCastle = false;
}
else if (moves[row][col].length) {
canCastle = false;
}
});
if (canCastle) {
castles.push({
col: cols[1], row, castles: rookCol });
}
}
};
const row = kingIsWhite ? "1" : "8";
if (!this.pieces[`A${
row}`].moves.length) {
checkPositions(row, "A", castles);
}
if (!this.pieces[`H${
row}`].moves.length) {
checkPositions(row, "H", castles);
}
return castles;
}
kingCheckStates(kingPosition, captures, piecePositions) {
const {
col, row } = kingPosition;
return captures[row][col].map((id) => piecePositions[id]).filter((pos) => pos.active);
}
pieceCalculateMoves(pieceId, moveIndex, state, piecePositions, piecesTilesCaptures, piecesTilesMoves, tilesPiecesCaptures, tilesPiecesMoves, resultingChecks, kingCastles) {
const {
captures, moves } = this.pieces[pieceId].options(moveIndex, state, this.pieces, piecePositions, resultingChecks, kingCastles);
piecesTilesCaptures[pieceId] = Array.from(captures);
piecesTilesMoves[pieceId] = Array.from(moves);
captures.forEach(({
col, row }) => tilesPiecesCaptures[row][col].push(pieceId));
moves.forEach(({
col, row }) => tilesPiecesMoves[row][col].push(pieceId));
}
pieceCapture(piece) {
const pieceId = piece.data.id;
const {
col, row } = this.piecePositions[pieceId];
this.state[row][col] = undefined;
delete this.piecePositions[pieceId].col;
delete this.piecePositions[pieceId].row;
this.piecePositions[pieceId].active = false;
}
pieceMove(piece, location) {
const pieceId = piece.data.id;
const {
row, col } = this.piecePositions[pieceId];
this.state[row][col] = undefined;
this.state[location.row][location.col] = pieceId;
this.piecePositions[pieceId].row = location.row;
this.piecePositions[pieceId].col = location.col;
if (piece.data.type === "PAWN" && (location.row === "8" || location.row === "1")) {
piece.promote();
}
}
piecesUpdate(moveIndex) {
this.tilesPiecesBlackCaptures = Utils.getInitialBoardState(() => []);
this.tilesPiecesBlackMoves = Utils.getInitialBoardState(() => []);
this.tilesPiecesWhiteCaptures = Utils.getInitialBoardState(() => []);
this.tilesPiecesWhiteMoves = Utils.getInitialBoardState(() => []);
this.pieceIdsBlack.forEach((id) => this.pieceCalculateMoves(id, moveIndex, this.state, this.piecePositions, this.piecesTilesCaptures, this.piecesTilesMoves, this.tilesPiecesBlackCaptures, this.tilesPiecesBlackMoves, this.resultingChecks.bind(this), this.kingCastles.bind(this)));
this.pieceIdsWhite.forEach((id) => this.pieceCalculateMoves(id, moveIndex, this.state, this.piecePositions, this.piecesTilesCaptures, this.piecesTilesMoves, this.tilesPiecesWhiteCaptures, this.tilesPiecesWhiteMoves, this.resultingChecks.bind(this), this.kingCastles.bind(this)));
this.checksBlack = this.kingCheckStates(this.piecePositions.E1, this.tilesPiecesBlackCaptures, this.piecePositions);
this.checksWhite = this.kingCheckStates(this.piecePositions.E8, this.tilesPiecesWhiteCaptures, this.piecePositions);
}
resultingChecks({
piece, location, capture, moveIndex }) {
const tilesPiecesCaptures = Utils.getInitialBoardState(() => []);
const tilesPiecesMoves = Utils.getInitialBoardState(() => []);
const piecesTilesCaptures = {
};
const piecesTilesMoves = {
};
const state = JSON.parse(JSON.stringify(this.state));
const piecePositions = JSON.parse(JSON.stringify(this.piecePositions));
if (capture) {
const loc = location.capture || location;
const capturedId = state[loc.row][loc.col];
if (!(this.pieces[capturedId].data.type === "KING")) {
delete piecePositions[capturedId].col;
delete piecePositions[capturedId].row;
piecePositions[capturedId].active = false;
}
}
const pieceId = piece.data.id;
const {
row, col } = piecePositions[pieceId];
state[row][col] = undefined;
state[location.row][location.col] = pieceId;
piecePositions[pieceId].row = location.row;
piecePositions[pieceId].col = location.col;
const ids = piece.playerWhite() ? this.pieceIdsBlack : this.pieceIdsWhite;
const king = piece.playerWhite() ? piecePositions.E1 : piecePositions.E8;
ids.forEach((id) => this.pieceCalculateMoves(id, moveIndex, state, piecePositions, piecesTilesCaptures, piecesTilesMoves, tilesPiecesCaptures, tilesPiecesMoves));
return this.kingCheckStates(king, tilesPiecesCaptures, piecePositions);
}
tileEach(callback) {
Board.ROWS.forEach((row) => {
Board.COLS.forEach((col) => {
const piece = this.tileFind({
row, col });
const moves = piece ? this.piecesTilesMoves[piece.data.id] : undefined;
const captures = piece ? this.piecesTilesCaptures[piece.data.id] : undefined;
callback({
row, col }, piece, moves, captures);
});
});
}
tileFind({
row, col }) {
const id = this.state[row][col];
return this.pieces[id];
}
toShortCode() {
const positionsAbsolute = [];
const positionsDefaults = [];
for (let id in this.piecePositions) {
const {
active, col, row } = this.piecePositions[id];
const pos = `${
col}${
row}`;
const moves = this.pieces[id].moves;
const promotedCode = this.pieces[id].promoted ? "P" : "";
const movesCode = moves > 9 ? "9" : moves > 1 ? moves.toString() : "";
if (active) {
positionsAbsolute.push(`${
promotedCode}${
id}${
id === pos ? "" : pos}${
movesCode}`);
if (id !== pos || moves > 0) {
positionsDefaults.push(`${
promotedCode}${
id}${
pos}${
movesCode}`);
}
}
else {
if (id !== "BQ" && id !== "WQ") {
positionsDefaults.push(`${
promotedCode}${
id}X`);
}
}
}
const pA = positionsAbsolute.join(",");
const pD = positionsDefaults.join(",");
return pA.length > pD.length ? `X${
pD}` : pA;
}
}
Board.COLS = ["A", "B", "C", "D", "E", "F", "G", "H"];
Board.ROWS = ["1", "2", "3", "4", "5", "6", "7", "8"];
class Game {
constructor(pieces, piecePositions, turn = "WHITE") {
this.active = null;
this.activePieceOptions = [];
this.moveIndex = 0;
this.moves = [];
this.turn = turn;
this.board = new Board(pieces, piecePositions);
}
activate(location) {
const tilePiece = this.board.tileFind(location);
if (tilePiece && !this.active && tilePiece.data.player !== this.turn) {
this.active = null;
return {
type: "INVALID" };
}
else if (this.active) {
const activePieceId = this.active.data.id;
this.active = null;
const validatedPosition = this.activePieceOptions.find((option) => option.col === location.col && option.row === location.row);
const positionIsValid = !!validatedPosition;
this.activePieceOptions = [];
const capturePiece = (validatedPosition === null || validatedPosition === void 0 ? void 0 : validatedPosition.capture) ? this.board.tileFind(validatedPosition.capture) : tilePiece;
if (capturePiece) {
const capturedPieceId = capturePiece.data.id;
if (capturedPieceId === activePieceId) {
return {
type: "CANCEL" };
}
else if (positionIsValid) {
this.capture(activePieceId, capturedPieceId, location);
return {
type: "CAPTURE",
activePieceId,
capturedPieceId,
captures: [location],
};
}
else if (capturePiece.data.player !== this.turn) {
return {
type: "CANCEL" };
}
}
else if (positionIsValid) {
const castledId = this.move(activePieceId, location);
return {
type: "MOVE", activePieceId, moves: [location], castledId };
}
else {
return {
type: "CANCEL" };
}
}
if (tilePiece) {
const tilePieceId = tilePiece.data.id;
const moves = this.board.piecesTilesMoves[tilePieceId];
const captures = this.board.piecesTilesCaptures[tilePieceId];
if (!moves.length && !captures.length) {
return {
type: "INVALID" };
}
this.active = tilePiece;
this.activePieceOptions = moves.concat(captures);
return {
type: "TOUCH", captures, moves, activePieceId: tilePieceId };
}
else {
this.activePieceOptions = [];
return {
type: "CANCEL" };
}
}
capture(capturingPieceId, capturedPieceId, location) {
const captured = this.board.pieces[capturedPieceId];
this.board.pieceCapture(captured);
this.move(capturingPieceId, location, true);
}
handleCastling(piece, location) {
if (piece.data.type !== "KING" ||
piece.moves.length ||
location.row !== (piece.playerWhite() ? "1" : "8") ||
(location.col !== "C" && location.col !== "G")) {
return;
}
return `${
location.col === "C" ? "A" : "H"}${
location.row}`;
}
move(pieceId, location, capture = false) {
const piece = this.board.pieces[pieceId];
const castledId = this.handleCastling(piece, location);
piece.move(this.moveIndex);
if (castledId) {
const castled = this.board.pieces[castledId];
castled.move(this.moveIndex);
this.board.pieceMove(castled, {
col: location.col === "C" ? "D" : "F", row: location.row });
this.moves.push(`${
pieceId}O${
location.col}${
location.row}`);
}
else {
this.moves.push(`${
pieceId}${
capture ? "x" : ""}${
location.col}${
location.row}`);
}
this.moveIndex++;
this.board.pieceMove(piece, location);
this.turn = this.turn === "WHITE" ? "BLACK" : "WHITE";
this.board.piecesUpdate(this.moveIndex);
const state = this.moveResultState();
console.log(state);
if (!state.moves && !state.captures) {
alert(state.stalemate ? "Stalemate!" : `${
this.turn === "WHITE" ? "Black" : "White"} Wins!`);
}
return castledId;
}
moveResultState() {
let movesWhite = 0;
let capturesWhite = 0;
let movesBlack = 0;
let capturesBlack = 0;
this.board.tileEach(({
row, col }) => {
movesWhite += this.board.tilesPiecesWhiteMoves[row][col].length;
capturesWhite += this.board.tilesPiecesWhiteCaptures[row][col].length;
movesBlack += this.board.tilesPiecesBlackMoves[row][col].length;
capturesBlack += this.board.tilesPiecesBlackCaptures[row][col].length;
});
const activeBlack = this.board.pieceIdsBlack.filter((pieceId) => this.board.piecePositions[pieceId].active).length;
const activeWhite = this.board.pieceIdsWhite.filter((pieceId) => this.board.piecePositions[pieceId].active).length;
const moves = this.turn === "WHITE" ? movesWhite : movesBlack;
const captures = this.turn === "WHITE" ? capturesWhite : capturesBlack;
const noMoves = movesWhite + capturesWhite + movesBlack + capturesBlack === 0;
const checked = !!this.board[this.turn === "WHITE" ? "checksBlack" : "checksWhite"].length;
const onlyKings = activeBlack === 1 && activeWhite === 1;
const stalemate = onlyKings || noMoves || ((moves + captures === 0) && !checked);
const code = this.board.toShortCode();
return {
turn: this.turn, checked, moves, captures, code, stalemate };
}
randomMove() {
if (this.active) {
if (this.activePieceOptions.length) {
const {
col, row } = this.activePieceOptions[Math.floor(Math.random() * this.activePieceOptions.length)];
return {
col, row };
}
else {
const {
col, row } = this.board.piecePositions[this.active.data.id];
return {
col, row };
}
}
else {
const ids = this.turn === "WHITE" ? this.board.pieceIdsWhite : this.board.pieceIdsBlack;
const positions = ids.map((pieceId) => {
const moves = this.board.piecesTilesMoves[pieceId];
const captures = this.board.piecesTilesCaptures[pieceId];
return (moves.length || captures.length) ? this.board.piecePositions[pieceId] : undefined;
}).filter((position) => position === null || position === void 0 ? void 0 : position.active);
const remaining = positions[Math.floor(Math.random() * positions.length)];
const {
col, row } = remaining || {
col: "E", row: "1" };
return {
col, row };
}
}
}
class View {
constructor(element, game, perspective) {
this.element = element;
this.game = game;
this.setPerspective(perspective || this.game.turn);
this.tiles = Utils.getInitialBoardTiles(this.element, this.handleTileClick.bind(this));
this.pieces = Utils.getInitialBoardPieces(this.element, this.game.board.pieces);
this.drawPiecePositions();
}
drawActivePiece(activePieceId) {
const {
row, col } = this.game.board.piecePositions[activePieceId];
this.tiles[row][col].classList.add("highlight-active");
this.pieces[activePieceId].classList.add("highlight-active");
}
drawCapturedPiece(capturedPieceId) {
const piece = this.pieces[capturedPieceId];
piece.style.setProperty("--transition-delay", "var(--transition-duration)");
piece.style.removeProperty("--pos-col");
piece.style.removeProperty("--pos-row");
piece.style.setProperty("--scale", "0");
}
drawPiecePositions(moves = [], moveInner = "") {
document.body.style.setProperty("--color-background", `var(--color-${
this.game.turn.toLowerCase()}`);
const other = this.game.turn === "WHITE" ? "turn-black" : "turn-white";
const current = this.game.turn === "WHITE" ? "turn-white" : "turn-black";
this.element.classList.add(current);
this.element.classList.remove(other);
if (moves.length) {
this.element.classList.add("touching");
}
else {
this.element.classList.remove("touching");
}
const key = (row, col) => `${
row}-${
col}`;
const moveKeys = moves.map(({
row, col }) => key(row, col));
this.game.board.tileEach(({
row, col }, piece, pieceMoves, pieceCaptures) => {
const tileElement = this.tiles[row][col];
const move = moveKeys.includes(key(row, col)) ? moveInner : "";
const format = (id, className) => this.game.board.pieces[id].shape();
tileElement.innerHTML = `
<div class="move">${
move}</div>
<div class="moves">
${
this.game.board.tilesPiecesBlackMoves[row][col].map((id) => format(id, "black")).join("")}
${
this.game.board.tilesPiecesWhiteMoves[row][col].map((id) => format(id, "white")).join("")}
</div>
<div class="captures">
${
this.game.board.tilesPiecesBlackCaptures[row][col].map((id) => format(id, "black")).join("")}
${
this.game.board.tilesPiecesWhiteCaptures[row][col].map((id) => format(id, "white")).join("")}
</div>
`;
if (piece) {
tileElement.classList.add("occupied");
const pieceElement = this.pieces[piece.data.id];
pieceElement.style.setProperty("--pos-col", Utils.colToInt(col).toString());
pieceElement.style.setProperty("--pos-row", Utils.rowToInt(row).toString());
pieceElement.style.setProperty("--scale", "1");
pieceElement.classList[(pieceMoves === null || pieceMoves === void 0 ? void 0 : pieceMoves.length) ? "add" : "remove"]("can-move");
pieceElement.classList[(pieceCaptures === null || pieceCaptures === void 0 ? void 0 : pieceCaptures.length) ? "add" : "remove"]("can-capture");
if (piece.updateShape) {
piece.updateShape = false;
pieceElement.innerHTML = piece.shape();
}
}
else {
tileElement.classList.remove("occupied");
}
});
}
drawPositions(moves, captures) {
moves === null || moves === void 0 ? void 0 : moves.forEach(({
row, col }) => {
var _a, _b;
this.tiles[row][col].classList.add("highlight-move");
(_b = this.pieces[(_a = this.game.board.tileFind({
row, col })) === null || _a === void 0 ? void 0 : _a.data.id]) === null || _b === void 0 ? void 0 : _b.classList.add("highlight-move");
});
captures === null || captures === void 0 ? void 0 : captures.forEach(({
row, col, capture }) => {
var _a, _b;
if (capture) {
row = capture.row;
col = capture.col;
}
this.tiles[row][col].classList.add("highlight-capture");
(_b = this.pieces[(_a = this.game.board.tileFind({
row, col })) === null || _a === void 0 ? void 0 : _a.data.id]) === null || _b === void 0 ? void 0 : _b.classList.add("highlight-capture");
});
}
drawResetClassNames() {
document.querySelectorAll(".highlight-active").forEach((element) => element.classList.remove("highlight-active"));
document.querySelectorAll(".highlight-capture").forEach((element) => element.classList.remove("highlight-capture"));
document.querySelectorAll(".highlight-move").forEach((element) => element.classList.remove("highlight-move"));
}
handleTileClick(location) {
const {
activePieceId, capturedPieceId, moves = [], captures = [], type } = this.game.activate(location);
this.drawResetClassNames();
if (type === "TOUCH") {
const enPassant = captures.find((capture) => !!capture.capture);
const passingMoves = enPassant ? moves.concat([enPassant]) : moves;
this.drawPiecePositions(passingMoves, this.game.board.pieces[activePieceId].shape());
}
else {
this.drawPiecePositions();
}
if (type === "CANCEL" || type === "INVALID") {
return;
}
if (type === "MOVE" || type === "CAPTURE") {
}
else {
this.drawActivePiece(activePieceId);
}
if (type === "TOUCH") {
this.drawPositions(moves, captures);
}
else if (type === "CAPTURE") {
this.drawCapturedPiece(capturedPieceId);
}
}
setPerspective(perspective) {
const other = perspective === "WHITE" ? "perspective-black" : "perspective-white";
const current = perspective === "WHITE" ? "perspective-white" : "perspective-black";
this.element.classList.add(current);
this.element.classList.remove(other);
}
}
class Control {
constructor(game, view) {
this.inputSpeedAsap = document.getElementById("speed-asap");
this.inputSpeedFast = document.getElementById("speed-fast");
this.inputSpeedMedium = document.getElementById("speed-medium");
this.inputSpeedSlow = document.getElementById("speed-slow");
this.inputRandomBlack = document.getElementById("black-random");
this.inputRandomWhite = document.getElementById("white-random");
this.inputPerspectiveBlack = document.getElementById("black-perspective");
this.inputPerspectiveWhite = document.getElementById("white-perspective");
this.game = game;
this.view = view;
this.inputPerspectiveBlack.addEventListener("change", this.updateViewPerspective.bind(this));
this.inputPerspectiveWhite.addEventListener("change", this.updateViewPerspective.bind(this));
this.updateViewPerspective();
}
get speed() {
if (this.inputSpeedAsap.checked) {
return 50;
}
if (this.inputSpeedFast.checked) {
return 250;
}
if (this.inputSpeedMedium.checked) {
return 500;
}
if (this.inputSpeedSlow.checked) {
return 1000;
}
}
autoplay() {
const input = this.game.turn === "WHITE" ? this.inputRandomWhite : this.inputRandomBlack;
if (!input.checked) {
setTimeout(this.autoplay.bind(this), this.speed);
return;
}
const position = this.game.randomMove();
this.view.handleTileClick(position);
setTimeout(this.autoplay.bind(this), this.speed);
}
updateViewPerspective() {
this.view.setPerspective(this.inputPerspectiveBlack.checked ? "BLACK" : "WHITE");
}
}
const DEMOS = {
castle1: "XD8B3,B1X,C1X,D1X,F1X,G1X",
castle2: "XD8B3,B1X,C1X,C2X,D1X,F1X,G1X",
castle3: "XD8E3,B1X,C1X,F2X,D1X,F1X,G1X",
promote1: "E1,E8,C2C7",
promote2: "E1,E8E7,PC2C8",
start: "XE7E6,F7F5,D2D4,E2E5",
test2: "C8E2,E8,G8H1,D7E4,H7H3,PA2H7,PB2G7,D2D6,E2E39,A1H2,E1B3",
test: "C8E2,E8,G8H1,D7E4,H7H3,D1H7,PB2G7,D2D6,E2E39,A1H2,E1B3",
};
const initialPositions = Utils.getInitialPiecePositions();
const initialTurn = "WHITE";
const perspective = "WHITE";
const game = new Game(Utils.getInitialPieces(), initialPositions, initialTurn);
const view = new View(document.getElementById("board"), game, perspective);
const control = new Control(game, view);
control.autoplay();